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Read the WELCOME ALL BMWFANATICS post.
New N54 record for Software only in the country
- Thread starter Sherwin@xcede
- Start date
Dean ///M
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Terry..
Hey guys,
I normally try to avoid replying to these sorts of things. But, I just read some JB4 test results performed by a competitor that are obliviously flawed. So much so I'm sort of shocked they are posting them with a straight face. So I want to clear the air on them. As a preface I've noticed a common trend of tuners doing "comparison" tests against the JB4, supposedly talented tuners, who suddenly go stupid when dealing with the JB4 and "accidentally" set something wrong without realizing it. I wonder why that is.
http://www.e90post.com/forums/showthread.php?t=1091724
The problem with these specific results are the JB4 was set for overly conservative tuning. They set the JB4 to non-default mode 4/2, ignore flash boost targets, and tested maps 1 & 2. Which are 13psi & 14.5psi respectively. Given the low timing of the back end flash these two maps resulted in weaker HP output as expected. With such low timing you need to get boost over 16psi to just break even on power vs the OEM flash. The settings they used are what you'd do on a road race course or somewhere you wanted to be very conservative with low boost and low timing. If they had the correct 4/3 setting both maps 1 & 2 would have put down from 15-16psi peak with normal power levels.
Then they did a run in map 5, the auto-tuning map, and power started to come up. But it would take several runs to get map 5 to learn up to its full target. Especially so with the 4/2 mode set. Clearly they didn't do enough pulls on that map to allow it to learn up to the low timing back end flash map they added.
Typically, a car with those mods, running pump gas, on the JB4 with a back end flash, will hit 400whp.
Regarding their claims of magic fueling and VANOS changes with their locked flash tuning, in my opinion, it's all bull. The fueling and VANOS changes in the back end flash map are about as good as it gets there. They talk about that stuff, without logs to quantify their discussion, to distract from the only two things that matter in these sorts of tests. Boost & timing advance.
http://www.n54tech.com/forums/showthread.php?t=28811
Hey guys,
I normally try to avoid replying to these sorts of things. But, I just read some JB4 test results performed by a competitor that are obliviously flawed. So much so I'm sort of shocked they are posting them with a straight face. So I want to clear the air on them. As a preface I've noticed a common trend of tuners doing "comparison" tests against the JB4, supposedly talented tuners, who suddenly go stupid when dealing with the JB4 and "accidentally" set something wrong without realizing it. I wonder why that is.
http://www.e90post.com/forums/showthread.php?t=1091724
The problem with these specific results are the JB4 was set for overly conservative tuning. They set the JB4 to non-default mode 4/2, ignore flash boost targets, and tested maps 1 & 2. Which are 13psi & 14.5psi respectively. Given the low timing of the back end flash these two maps resulted in weaker HP output as expected. With such low timing you need to get boost over 16psi to just break even on power vs the OEM flash. The settings they used are what you'd do on a road race course or somewhere you wanted to be very conservative with low boost and low timing. If they had the correct 4/3 setting both maps 1 & 2 would have put down from 15-16psi peak with normal power levels.
Then they did a run in map 5, the auto-tuning map, and power started to come up. But it would take several runs to get map 5 to learn up to its full target. Especially so with the 4/2 mode set. Clearly they didn't do enough pulls on that map to allow it to learn up to the low timing back end flash map they added.
Typically, a car with those mods, running pump gas, on the JB4 with a back end flash, will hit 400whp.
Regarding their claims of magic fueling and VANOS changes with their locked flash tuning, in my opinion, it's all bull. The fueling and VANOS changes in the back end flash map are about as good as it gets there. They talk about that stuff, without logs to quantify their discussion, to distract from the only two things that matter in these sorts of tests. Boost & timing advance.
http://www.n54tech.com/forums/showthread.php?t=28811
Dean. I went to Stars as requested and made 290 with zero hardware. A true test of tuning. You welcome to go set up a JB only car and go beat that. Should b easy if flash tuning makes no difference.
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